Fraunhofer Center for Research in Computer Graphics, Inc.

Lars B Karle

Michael Haley

A technique for managing conference state. Endpoints of the conference are application processes ( ) running on computer systems that are connected by a WAN ( ). Each of the application processes ( ) maintains endpoint state for the conference. A session manager process ( ) in each of the computer systems maintains session manager state for each of the conferences that has an endpoint on the computer system. The session manager conference state includes a copy of the endpoint state for each of the conferences and the session manager ( ) uses a locking mechanism to that the copies of the session manager conference state in all of the session managers ( ) are identical. When an endpoint changes its endpoint state, it informs the session manager ( ), the session manager ( ) incorporates the change into its session manager conference state, and when the locking mechanism permits, exports the change to the session managers ( ) for all the other endpoints. When the session manager ( ) receives a change, it incorporates the change into its session manager conference state.

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Portsmouth, RI, United States of America

Lars B Karle